Tagging along. I'm curious as to what people will say. I can tell you that the number of tangs will be a major factor. They are grazers and prefer to eat all day long so they add a significant amount of waste into your system. Clowns don't produce a lot of waste (not like a tang anyway). The kind of tangs you add makes a difference too. Some tangs will get to be over 12" in your tank while others will remain around 6-8". There's so many variables I think it will be hard to get an exact number but maybe someone that's more experienced than me can give you a pretty good idea. Do you have a specific list of what tangs you are wanting and how many of each? I think that may help others in giving you a number
John

Well we already have a yellow tang, a sailfin tang, and a blue tang, so I don't plan on getting any more tangs. We have a clown too. So we're already on the trail, but I'm just needing to know when I should stop. I think I might get a goby next because we have an ocean's worth of pods everywhere in the rock.

I have six fish in my 46. A maroon, lawnmower, coral beauty, Pajama Cardinal, Fire
Goby, Blue damsel. I have another tank cycling that i am gonna use for one or two at least... i would think 20 large fish would be easy for a 300.... if you went with 5 or 6 large fish, and then went with all smaller fish from there i bet you could have 50. The thing is to add slowly, add a few fish, wait a month or two, check your ammonia, nitrite, nitrate levels in the weeks after adding and see how it does. When your tank gets to your liking then stop. if you get to where you are having nitrate climbing, or maybe an ammonia spike here and there i would say to back off...

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